Windows Phone新手开发教程（四）

在这一部分里，我将讲解如何编写一个应用程序以及访问Windows Phone中文本框的值。

首先从编写应用程序说起。

编写第一个应用程序

从File菜单选择New project，并选择Windows Phone applicaton。将三个文本框添加到网格面板，前两个文本框用于输入数值，第三个文本框显示结果。

MainPage.xaml 

<!--LayoutRoot is the root grid where all page content is placed--> 

<grid x:name="LayoutRoot" background="Transparent"> 

    <grid.rowdefinitions> 

        <rowdefinition height="Auto"> 

        <rowdefinition height="*"> 

    </rowdefinition></rowdefinition></grid.rowdefinitions> 

    <!--TitlePanel contains the name of the application and page title--> 

    <stackpanel x:name="TitlePanel" grid.row="0" margin="12,17,0,28"> 

        <textblock x:name="ApplicationTitle" text="MY APPLICATION" style="{StaticResource PhoneTextNormalStyle}"> 

        <textblock x:name="PageTitle" text="1st Application" margin="9,-7,0,0" style="{StaticResource PhoneTextTitle1Style}"> 

    </textblock></textblock></stackpanel> 

    <!--ContentPanel - place additional content here--> 

    <grid x:name="ContentPanel" grid.row="1" margin="12,0,12,0"> 

        <textblock x:name="lblfirst" text="Enter 1st Number" margin="25,38,241,527"></textblock> 

        <textblock x:name="lblsecond" text="Enter 2nd Number" margin="25,98,241,467"></textblock> 

        <textblock x:name="lblresult" text="Result" margin="25,161,241,404"></textblock> 

        <textbox x:name="txtfirst" margin="225,24,6,508"></textbox> 

        <textbox x:name="txtsecond" margin="225,84,6,450"></textbox> 

        <textbox x:name="txtresult" margin="225,147,6,381"></textbox> 

        <button x:name="btnadd" height="95" content="Addition" margin="0,232,0,280" click="btnadd_Click"></button> 

    </grid> 

</grid>

现在为按钮的点击事件编写代码，第一个和第二个文本框接收用户输入的数据，第三个文本框显示两个数字相加的结果。

MainPage.xaml.cs

using System; 

using System.Collections.Generic; 

using System.Linq; 

using System.Net; 

using System.Windows; 

using System.Windows.Controls; 

using System.Windows.Documents; 

using System.Windows.Input; 

using System.Windows.Media; 

using System.Windows.Media.Animation; 

using System.Windows.Shapes; 

using Microsoft.Phone.Controls; 

   

namespace WriteFirstApplication 

{ 

    public partial class MainPage : PhoneApplicationPage 

    { 

        // Constructor 

        public MainPage() 

        { 

            InitializeComponent(); 

        } 

   

        private void btnadd_Click(object sender, RoutedEventArgs e) 

        { 

              

            int result = Convert.ToInt32(txtfirst.Text)+Convert.ToInt32(txtsecond.Text); 

            txtresult.Text = result.ToString(); 

   

               

        } 

    } 

}

所有完成之后运行应用程序。

现在编写显示运行消息的信息提示框。你只需要添加一行代码就可以完成信息提示框的设计。

MessageBox.Show(“YourContent”)

MainPage.xaml.cs

using System; 

using System.Collections.Generic; 

using System.Linq; 

using System.Net; 

using System.Windows; 

using System.Windows.Controls; 

using System.Windows.Documents; 

using System.Windows.Input; 

using System.Windows.Media; 

using System.Windows.Media.Animation; 

using System.Windows.Shapes; 

using Microsoft.Phone.Controls; 

   

namespace WriteFirstApplication 

{ 

    public partial class MainPage : PhoneApplicationPage 

    { 

        // Constructor 

        public MainPage() 

        { 

            InitializeComponent(); 

        } 

   

        private void btnadd_Click(object sender, RoutedEventArgs e) 

        { 

              

            int result = Convert.ToInt32(txtfirst.Text)+Convert.ToInt32(txtsecond.Text); 

MessageBox.Show("Addition of "+ txtfirst.Text +"&"+ txtsecond.Text +"=" +result.ToString()); 

   

   

              

        } 

    } 

}

本文翻译自c-sharpcorner.com,原文地址